Since PSP firmware update 2.70, game companies have released several demos of PSP games which can be run straight from the memory stick.

Non-exhaustive list:

TitleID Title
NPJH90083 .hack//Link
NPJG90070 100 Man Ton no BaraBara
NPJH90123 Ace Combat X Joint Assault
NPJH90100 Advanced! Protect! Fight!
ULJM05171 Airport Hero Naha
ULJM05128 Airport Hero Narita
ULJM05189 All AHA experience! PlayStation Spot Version
UCES00302 Ape Academy 2
UCJS10060 Ape Escape
UCUS98655 Ape Escape Racing
NPJG90004 Ape Escape: Saru Saru Big Mission
ULKS46142 ASTO2 Demo Ver.
NPUH90076 Batman Arkham Asylum: The Road to Arkham Digital Comic Promo
NPJH90076 Battlefield Valkyria Chronicles 2 Royal officer school
UCED00432 B-Boy Demo
NPJG90020 Bleach Heat The Soul 5
NPJG90041 Bleach: Soul Carnival 2 Trial
ULJS00068 Blokus Club with Bumpy Trot / Blokus Portable: Steambot Championship
ULJS00021 Bounty Hounds
ULJM05126 Kawashima Ryuuta Kyouju Kanshuu Nouryoku Trainer Portable 2 / Brain Trainer Portable 2 PlayStation Spot version
NPJG90025 Brave namaikida or2 free trial!
NPUG70013 BUZZ! Demo
ULJM91004 Capcom 3 in 1 Demo
NPEH90045 Castle Rustle Demo
NPJH90116 Cladun: This is an RPG trial
NPJH90299 Corpse Party The Anthology Hysteric Birthday 2U Trial
NPUH90048 Crystal Defenders
NPJH90164 DanganRonpa: Trigger Happy Havoc
UCUS98654 Daxter Demo
NPJH90110 Dead or Alive Paradise
NPJG90040 Diamond and The Sound of a Gunshot
NPJW00001 Digital Comics Reader (jp)
NPEG00012 Digital Comics v2
NPEH90014 Dissidia Final Fantasy
NPUH90029 Dissidia Final Fantasy
ULKS46116 DJ Max Portable
NPHW00011 DMB-T TV TUNER APP
NPJH90135 Dragon Ball Z: Tenkaichi Tag Team
NPEH90042 DRAGON BALL® Z Tenkaichi Tag Team [PSP]
ULJM05164 Dungeon Explorer : Meiyaku no Tobira
ULUS10289 Dungeon Explorer: Warriors of Ancient Arts
NPJH90097 Dynasty Warriors MULTI RAID 2 v.A
NPJH90098 Dynasty Warriors MULTI RAID 2 v.B
NPJG90019 Echochrome PSP
NPHG00005 Echochrome PSP
NPUG70077 Echoshift Demo
NPUW00003 ESRB Video Game Ratings Guide
NPJG90047_1 Everybody's Sukkiri #1
NPJG90047_2 Everybody's Sukkiri #2
NPJG90047_3 Everybody's Sukkiri #3
NPJG90047_4 Everybody's Sukkiri #4
NPJG90069 Everybody's Sukkiri #5
ULJM05161 Exit: Kangaeru Exit / Exit 2
NPJH90252 Final Fantasy Type-0
NPJH90323 Frontier Gate Boost+
NPUH90001 Full Auto 2 Battlelines
ULUS10220 Full Auto 2 Battlelines
UCUS98689 Gangs of London Demo
NPJH90084 Gladiator Begins [Demo] [PSP]
NPUH90077 Gladiator Begins Demo
UCES90027 GO!EDIT
ULES00856 Go!Messenger
NPJH90338 God Eater 2 Trial Version
NPJH90069 God Eater Trial Version
NPJH90167 God Eater: Burst [Demo] [PSP]
UCUS98713 God of War: Chains of Olympus
NPJH90096 Gundam Assault Survive
NPJH90204 Gungnir Demo
ULJM05123 Gurumin: A Monstrous Adventure
NPJH90025 Half Minute Hero - MAOU30 [Demo] [PSP]
NPJH90115 Happy Go Lucky!!
NPJH90041 Hayarigami 2 Portable Trial
NPJH90057 Hayarigami 3 Trial
NPJH90040 Hayarigami PORTABLE
ULJM05469 Hello Kitty no Happy Accessory
NPJH90007 Hitman Reborn
NPJH90081 Hitman Reborn Tag
NPJG90009 Holy Invasion of Privacy, Badman! / Yuusha no Kuse ni Namaikida
ULJM05184 Homestar Portable
ULED90025 Hot Pixel
NPUG70014 Hot Shots Golf 2 Intermediate
NPJG90059 Hot Shots Tennis Portable [DEMO]
ULJS00141 Ikuze! Gen-San: Yuuyake Daiku Monogatari [PSP]
NPJH90004 INFINITE LOOP DREAM VISIONS FROM THE OLD CASTLE
NPJH90005 Infinite Loop Dream Visions from the Old Castle Demo
ULJS00087 Intelligent License 2
NPUG98755 Jak & Daxter: Lost Frontier Demo
NPJG90060 Jak and Daxter: The Lost Frontier Demo
NPUH90097 Jikandia: The Timeless Land Demo
ULJM05201 Kanji trainer portable spot
NPJH90061 Katekyo Hitman Reborn! Battle Arena 2 Spirit Burst Trial
UCJS10036 Kazuo
NPJH90015 Kenka Bancho: Badass Rumble Demo
UCET00247 Key of Heaven Demo
ULJM91009 Kidou Senshi Gundam Seed Rengou VS ZAFT Portable DEMO
UCES00279 Demo Killzone: Liberation
UCUS98646 Demo Killzone: Liberation
NPJG00085 Koushin Demo
ULJM05170 Legend of Heroes: Trails in the Sky
NPUH90019 Lego Batman: The Videogame
UCUS70064 Little Big Planet
NPJG90001 LocoRocoダウンロード体験版 (Christmas)
NPJG90002 LocoRoco™ おためし版
UCJS10041 LocoRoco™ download trial version
NPEG90012 LocoRoco 2
NPJG90034 LocoRoco 2
NPUG98731 LocoRoco 2 Demo
UCED90007 LocoRoco Christmas Demo
UCES00304 LocoRoco™ Halloween
NPJG00034 LocoRoco Midnight Carnival
NPUG80318 LocoRoco Midnight Carnival
NPJH90134 Lord of Arcana
NPJH90151 Lord of Arcana - Slayer Chain
ULJM05232 Lumines II
NPUH90053 Lunar Silver Star Harmony
ULJS00105 Mawaskes Based on Carton Kun
ULED90008 Medal of Honor Heroes
UCJS10043 Tama Run / Mercury Meltdown
NPEH90023 METAL GEAR SOLID PEACE WALKER
NPJH90063 Metal Gear Solid Peacewalker
ULED90040 Metal Gear Solid: Portable Ops
ULJM05393 Minna de Dokusho: Keitai Shousetsu Desuu [PSP]
ULJM05352 Minna de Dokusho: Meisaku & Suiri & Kaidan & Bungaku [PSP]
NPJG90047 Minna no sukkiri
NPJG90017 Minnano Golf 2 Intermediate
NPJG90016 Minnano Golf 2 Novice
UCUS98667 MLB '07 The Show
NPUH90026 Monster Hunter Freedom Unite
UCES00373 Moto GP
NPJG90067 Motorstorm Raging Ice
NPJH90059 Narisokonai Eiyuutan Taiyou to Tsuki no Monogatari [JP]
NPEH90049 Naruto Kizuna Drive
UCUS98644 NBA '07
UCUS98699 NBA '08
NPUG70007 NBA '09 THE INSIDE
NPJH90010 Neo Angelique Special
NPUH90021 Neverland Card Battles
NPEG90014 Numblast Demo
NPJG90107 Ore no shikabane o koete yuke
NPJG90011 Patapon
UCUS98721 Patapon
UCUS98734 Patapon 2
NPJG90088 Patapon 3
NPJG90094 Patapon 3 100 Hour Trial
UCKM84003 Personal Utility Disk
NPUH90024 Petz Saddle Club Demo
NPUH90012 Pipe Mania Demo
NPEG90015 PixelJunk Monsters
NPUG70057 PixelJunk Monsters
ULJM05135 脳に快感 アハ体験! / Pleasure in the brain AHA experience! PlayStation Spot version
NPJH90008 Prinny: Can I Really Be The Hero?
NPUH90052 Promethus Demo
NPUH90004 Puzzle Guzzle Demo Version
NPIA09002 Qriocity Music Unlimited App
NPJG90052 Qruton
NPJG90038 Remote agent
NPUG22850 Resistance Retribution
NPJG90037 Resistance Retribution Demo [JP]
ULJM05043 Rockman Irregular Hunter X Demo
ULJM91011 R-Type/Mawaskes Demo
UCJS10032 サルゲッチュ ピポサルレーサー Saru! Get You! Piposaru Racer
NPJH90127 Second novel-her summer
NPUG70011 Secret Agent Clank
ULET00919 Sega Rally Revo Demo
ULJS00159 Sengoku Efuda Yuugi: Hototogisu Ran [PSP]
NPIA00013 SensMe™ channels
ULJM05168 視て聴いて脳で感じてクロスワード天国 / Shichoka Crossword Demo
NPJH90099 Shin-Sangoku Musou MULTI RAID 2
UCED90036 Smash Court Tennis 3 Demo
UCED90042 SOCOM: Fireteam Bravo 2
UCUS98645 SOCOM: Fireteam Bravo 2
NPUG70003 SOCOM: Tactical Strike Demo
NPJH90291 Sol Trigger Demo
UJLM05315 Space Invaders Extreme
NPUH90040 StarWars Battlefront: Elite Squadron
UCUS98641 Syphon Filter Dark Mirror
NPUA80013 Syphon Filter Logans Shadow
NPJH90130 Tales of Phantasia X
NPJH90090 The Akuma Hunters - Exorsister
ULED90009 TOCA Race Driver 3
NPJG90003 Doko: Lets Gakkou / Together Everywhere! (Doko Demo Issyo)
NPJH90332 Toukiden: The Age of Demons Action
NPJG90105 UMD Passport
UTST99205 UMD Read and Verify
ULJS00137 Umihara Kawase Portable
NPJH90068 Undead Knights
NPUH90036 Undead Knights
ULJS00138 Valhalla Knights 2
NPJH90156 Valkyria Chronicles 3
NPJH90132 Venus & Braves
ULUS10313 Warhammer 40K Squad Command
NPUG70008 Wipeout Pulse Demo
UCUS98631 World Tour Soccer '06
UCES00206 World Tour Soccer 2
ULED90045 Worms Open Warfare 2
ULUS10260 Worms Open Warfare 2
NPJH00067 X-Radar App
ULED90043 Xyanide: Resurrection
NPJH90154 Yakuza: Black Panther
NPJH90274 Yakuza: Black Panther 2
NPJG90042 Bleach Heat The Soul 6
UCAS40063 LocoRoco™ download trial version
UCES00001 WipEout Pure
UCJS05232 Lumines ll
UCKS45020 LocoRoco™ Halloween
UCUS98662 LocoRoco Downloadable Demo
ULED90018 Mercury Meltdown
ULJM91014 ファンタシースターポータブル
ULJ00087 PQ2: Practical Intelligence Quotient 2 - 2.80 required - JP
UCES00422 Ridge Racer 2 - 2.71 - EN
?UCES00399? Moto GP - 2.71 - EN
UCAS40119 Ridge Racer 2 ?demo?

The oldest game demo[edit | edit source]

Looking at NPJG90001 (LocoRocoダウンロード体験版 (Christmas)), it seems to be the oldest demo according to its title ID and because PARAM.SFO requires PSP minimal FW 2.70. DATA.PSP is about 8 MB. There is no DATA.PSAR. That means this is the type of demo where there is only an executable in DATA.PSP and no DATA.PSAR.

The oldest game demo may also be UCJS10036 (Kazuo) or UCUS98662 (LocoRoco Downloadable Demo).